<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="https://www.thymeleaf.org">
<head>
  <title>登录</title>
</head>
<body>
<h1>登录</h1>
<div th:if="${param.error}">
  用户名或密码错误.</div>
<div th:if="${param.logout}">
  已经退出了</div>
<form th:action="@{/login}" method="post">
  <div>
    <input type="text" name="username" placeholder="Username"/>
  </div>
  <div>
    <input type="password" name="password" placeholder="Password"/>
  </div>
  <input type="submit" value="Log in" />
</form>
</body>
</html>
